1 /* Implementation of the EOSHIFT intrinsic
2 Copyright (C) 2002-2013 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
32 #if defined (HAVE_GFC_INTEGER_4)
35 eoshift3 (gfc_array_char
* const restrict ret
,
36 const gfc_array_char
* const restrict array
,
37 const gfc_array_i4
* const restrict h
,
38 const gfc_array_char
* const restrict bound
,
39 const GFC_INTEGER_4
* const restrict pwhich
,
40 const char * filler
, index_type filler_len
)
42 /* r.* indicates the return array. */
43 index_type rstride
[GFC_MAX_DIMENSIONS
];
48 /* s.* indicates the source array. */
49 index_type sstride
[GFC_MAX_DIMENSIONS
];
54 /* h.* indicates the shift array. */
55 index_type hstride
[GFC_MAX_DIMENSIONS
];
57 const GFC_INTEGER_4
*hptr
;
58 /* b.* indicates the bound array. */
59 index_type bstride
[GFC_MAX_DIMENSIONS
];
63 index_type count
[GFC_MAX_DIMENSIONS
];
64 index_type extent
[GFC_MAX_DIMENSIONS
];
74 /* The compiler cannot figure out that these are set, initialize
75 them to avoid warnings. */
80 arraysize
= size0 ((array_t
*) array
);
81 size
= GFC_DESCRIPTOR_SIZE(array
);
88 if (ret
->base_addr
== NULL
)
92 ret
->base_addr
= xmalloc (size
* arraysize
);
94 ret
->dtype
= array
->dtype
;
95 for (i
= 0; i
< GFC_DESCRIPTOR_RANK (array
); i
++)
99 ub
= GFC_DESCRIPTOR_EXTENT(array
,i
) - 1;
104 str
= GFC_DESCRIPTOR_EXTENT(ret
,i
-1)
105 * GFC_DESCRIPTOR_STRIDE(ret
,i
-1);
107 GFC_DIMENSION_SET(ret
->dim
[i
], 0, ub
, str
);
110 /* xmalloc allocates a single byte for zero size. */
111 ret
->base_addr
= xmalloc (size
* arraysize
);
114 else if (unlikely (compile_options
.bounds_check
))
116 bounds_equal_extents ((array_t
*) ret
, (array_t
*) array
,
117 "return value", "EOSHIFT");
120 if (unlikely (compile_options
.bounds_check
))
122 bounds_reduced_extents ((array_t
*) h
, (array_t
*) array
, which
,
123 "SHIFT argument", "EOSHIFT");
132 for (dim
= 0; dim
< GFC_DESCRIPTOR_RANK (array
); dim
++)
136 roffset
= GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
139 soffset
= GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
142 len
= GFC_DESCRIPTOR_EXTENT(array
,dim
);
147 extent
[n
] = GFC_DESCRIPTOR_EXTENT(array
,dim
);
148 rstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(ret
,dim
);
149 sstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(array
,dim
);
151 hstride
[n
] = GFC_DESCRIPTOR_STRIDE(h
,n
);
153 bstride
[n
] = GFC_DESCRIPTOR_STRIDE_BYTES(bound
,n
);
165 if (bound
&& bstride
[0] == 0)
168 dim
= GFC_DESCRIPTOR_RANK (array
);
169 rstride0
= rstride
[0];
170 sstride0
= sstride
[0];
171 hstride0
= hstride
[0];
172 bstride0
= bstride
[0];
173 rptr
= ret
->base_addr
;
174 sptr
= array
->base_addr
;
177 bptr
= bound
->base_addr
;
183 /* Do the shift for this dimension. */
185 if (( sh
>= 0 ? sh
: -sh
) > len
)
191 delta
= (sh
>= 0) ? sh
: -sh
;
195 src
= &sptr
[delta
* soffset
];
201 dest
= &rptr
[delta
* roffset
];
203 for (n
= 0; n
< len
- delta
; n
++)
205 memcpy (dest
, src
, size
);
216 memcpy (dest
, bptr
, size
);
225 memset (dest
, filler
[0], size
);
227 for (i
= 0; i
< size
; i
+= filler_len
)
228 memcpy (&dest
[i
], filler
, filler_len
);
233 /* Advance to the next section. */
240 while (count
[n
] == extent
[n
])
242 /* When we get to the end of a dimension, reset it and increment
243 the next dimension. */
245 /* We could precalculate these products, but this is a less
246 frequently used path so probably not worth it. */
247 rptr
-= rstride
[n
] * extent
[n
];
248 sptr
-= sstride
[n
] * extent
[n
];
249 hptr
-= hstride
[n
] * extent
[n
];
250 bptr
-= bstride
[n
] * extent
[n
];
254 /* Break out of the loop. */
270 extern void eoshift3_4 (gfc_array_char
* const restrict
,
271 const gfc_array_char
* const restrict
,
272 const gfc_array_i4
* const restrict
,
273 const gfc_array_char
* const restrict
,
274 const GFC_INTEGER_4
*);
275 export_proto(eoshift3_4
);
278 eoshift3_4 (gfc_array_char
* const restrict ret
,
279 const gfc_array_char
* const restrict array
,
280 const gfc_array_i4
* const restrict h
,
281 const gfc_array_char
* const restrict bound
,
282 const GFC_INTEGER_4
* const restrict pwhich
)
284 eoshift3 (ret
, array
, h
, bound
, pwhich
, "\0", 1);
288 extern void eoshift3_4_char (gfc_array_char
* const restrict
,
290 const gfc_array_char
* const restrict
,
291 const gfc_array_i4
* const restrict
,
292 const gfc_array_char
* const restrict
,
293 const GFC_INTEGER_4
* const restrict
,
294 GFC_INTEGER_4
, GFC_INTEGER_4
);
295 export_proto(eoshift3_4_char
);
298 eoshift3_4_char (gfc_array_char
* const restrict ret
,
299 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
300 const gfc_array_char
* const restrict array
,
301 const gfc_array_i4
* const restrict h
,
302 const gfc_array_char
* const restrict bound
,
303 const GFC_INTEGER_4
* const restrict pwhich
,
304 GFC_INTEGER_4 array_length
__attribute__((unused
)),
305 GFC_INTEGER_4 bound_length
__attribute__((unused
)))
307 eoshift3 (ret
, array
, h
, bound
, pwhich
, " ", 1);
311 extern void eoshift3_4_char4 (gfc_array_char
* const restrict
,
313 const gfc_array_char
* const restrict
,
314 const gfc_array_i4
* const restrict
,
315 const gfc_array_char
* const restrict
,
316 const GFC_INTEGER_4
* const restrict
,
317 GFC_INTEGER_4
, GFC_INTEGER_4
);
318 export_proto(eoshift3_4_char4
);
321 eoshift3_4_char4 (gfc_array_char
* const restrict ret
,
322 GFC_INTEGER_4 ret_length
__attribute__((unused
)),
323 const gfc_array_char
* const restrict array
,
324 const gfc_array_i4
* const restrict h
,
325 const gfc_array_char
* const restrict bound
,
326 const GFC_INTEGER_4
* const restrict pwhich
,
327 GFC_INTEGER_4 array_length
__attribute__((unused
)),
328 GFC_INTEGER_4 bound_length
__attribute__((unused
)))
330 static const gfc_char4_t space
= (unsigned char) ' ';
331 eoshift3 (ret
, array
, h
, bound
, pwhich
,
332 (const char *) &space
, sizeof (gfc_char4_t
));